Defn: An extensive artificial group of invertebrates, having all the parts arranged radially around the vertical axis of the body, and the various organs repeated symmetrically in each ray or spheromere.
Note: It includes the coelenterates and the echinoderms. Formerly, the group was supposed to be a natural one, and was considered one of the grand divisions of the animal kingdom.
RADIATE
Ra"di*ate, v. i. [imp. & p. p. Radiated; p. pr. & vb. n. Radiating.]
Etym: [L. radiatus, p. p. of radiare to furnish with spokes or rays,
to radiate, fr. radius. See Radius, Ray a divergent line.]
1. To emit rays; to be radiant; to shine. Virtues shine more clear In them [kings], and radiant like the sun at noon. Howell.
2. To proceed in direct lines from a point or surface; to issue in rays, as light or heat. Light radiates from luminous bodies directly to our eyes. Locke.
RADIATE
Ra"di*ate, v. t.
1. To emit or send out in direct lines from a point or points; as, to radiate heat.
2. To enlighten; to illuminate; to shed light or brightness on; to irradiate. [R.]
RADIATE
Ra"di*ate, a. Etym: [L. radiatus, p. p.]
1. Having rays or parts diverging from a center; radiated; as, a radiate crystal.